Technical Documentation for Single API

We have a single API that has yet to be written for which we have developed a pretty simple functioal specification.? We need someone to write the technical documentation for it such that it will be easily digested by customers.? The finished product should be an API guide for our easy one method Soap Webservice based api. Someone who has done this before and has a predefined template would be ideal.? We are a software company who would likely use you again for similar projects, however we don't have any technical writers on staff. the API has approximately 5 parameters on the request and returns approximately 10 fields.? You would need to document the function call, the parameters and the response.? Additionally you would need to create examples for the request and response. We prefer only to deal with fluent english speakers / writers on this project. ## Deliverables The documentation shall be provided as an MS Word document.